I'm liking the idea as well as your execution of it. Most of my gripes are going to come from two aspects:
1. The difficulty of the burning half, and
2. How you've actually handled
showing the burning half.
I recognize that you just got this level and you have a lot of time to touch up the finer details, so I'll break down what I noticed:
Oddly worded. Try something along the lines of:
THIS FOREST IS NOW UNDER NORVEG'S CONTROL AND WILL BE BURNT SHORTLY TO MAKE WAY FOR A NEW FACTORY.
That is an absolute nightmare to get, even by world 2's standards. Try removing either the left or right flame jet.
Too hard.
Also too hard, though simply getting rid of the Super Koopa can fix that.
This jump is also quite brutal.
What would be nice in the second half is a more "burnt" atmosphere. I know you said the graphics are still kind of a WIP, and I don't even think you need to draw anything new. Some palette alteration would work wonders here (greys, reds, and oranges rather than yellows and greens). As an added bonus, perhaps we can throw in the odd "quake" or wavy HDMA later on.
One other thing; that name you chose seems about as generic as you can get, especially compared to "Euphoric Eminence". Not only that, but another level also uses the suffix "Forest". It might be worth thinking up something new (or get some suggestions from people here) further down the road.
That's all. Keep up the good work and try to make those necessary changes.